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Is vacuum having any temperature.?

  1. Jun 3, 2012 #1
    if vacuum has virtual particles it should have temperature right.? If a perfect vacuum exists ie without any virtual particles..whats temperature of this .is it zero.?
     
  2. jcsd
  3. Jun 4, 2012 #2

    Ger

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    Virtual temperature. What would be the meaning of that? The average energy content of the vacuum expressed as if it is a gas in a box? That looks like the cosmological constant (some 6e-9 Joule/m3) as being the amount seemingly to escape from that virtual box of radiation gas. If it is balanced that would be the temperature on the outside as well.
     
  4. Jun 5, 2012 #3
    I dont mention virtual temperature anyway...did u conclude that temperature of vacuum to be zero Kelvin.?
     
  5. Jun 5, 2012 #4

    Ger

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    Temperature is propotional to the average kinetic energy of an idealized mon-atomic gas. So if in space there is some energy, there will be some temperature. Just a few nano Kelvin above absolute zero.
    If talking about virtual particles with properties like inverse time travel, negative mass or what ever is needed to get the dimensions right for the result to make sense, I do not see any sensible way of assigning a real (as opposed to the imaginary part) value to something completely imaginary/virtual. That virtual temperature could be well below the absolute 0 temperature
     
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